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Related Concept Videos

Mitochondrial Membranes01:45

Mitochondrial Membranes

A single mitochondrion is a bean-shaped organelle enclosed by a double-membrane system. The outer membrane of mitochondria is smooth and contains many porins - the integral membrane transporters. Porins enable free diffusion of ions and small uncharged molecules through the outer mitochondrial membrane but limit the transport of molecules larger than 5000 Daltons. Further, the outer mitochondrial membrane forms a unique structure called membrane contact sites with other subcellular organelles,...

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Detection of Mitochondria Membrane Potential to Study CLIC4 Knockdown-induced HN4 Cell Apoptosis In Vitro
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Assessing mitochondrial outer membrane permeabilization during apoptosis.

Zankruti Dave1, Maya Byfield, Ella Bossy-Wetzel

  • 1Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, 4000 Central Florida Blvd., Orlando, FL 32816, USA.

Methods (San Diego, Calif.)
|October 29, 2008
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This study presents three reliable methods to detect cytochrome c release from mitochondria, a key event in apoptosis. These techniques aid in understanding the mechanisms regulating mitochondrial outer membrane permeabilization (MOMP) and its role in disease.

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11:53

Immunodetection of Outer Membrane Proteins by Flow Cytometry of Isolated Mitochondria

Published on: September 18, 2014

Area of Science:

  • Cell Biology
  • Biochemistry
  • Molecular Biology

Background:

  • Mitochondria are central regulators of apoptosis, a programmed cell death pathway crucial for development and health.
  • Dysregulation of apoptosis, involving either excessive or inhibited cell death, is implicated in various diseases, including neurodegeneration and cancer.
  • Mitochondrial outer membrane permeabilization (MOMP) is an early and critical step in apoptosis, characterized by the release of apoptogenic factors like cytochrome c.

Purpose of the Study:

  • To describe and validate three reliable techniques for detecting cytochrome c release from mitochondria.
  • To provide researchers with practical methods for studying MOMP.
  • To facilitate the identification of mechanisms and factors that regulate MOMP.

Main Methods:

  • Subcellular fractionation to isolate mitochondria and analyze cytochrome c distribution.
  • Immunocytochemistry and fluorescence microscopy to visualize cytochrome c release in situ.
  • In vitro assays using isolated mitochondria and recombinant proteins (Bax, t-Bid) to mimic MOMP.

Main Results:

  • The described techniques reliably detect cytochrome c release, confirming their utility in apoptosis research.
  • These methods allow for the quantitative and qualitative assessment of MOMP.
  • The in vitro system effectively recapitulates key aspects of MOMP induction.

Conclusions:

  • The presented techniques offer robust tools for investigating the role of mitochondria in apoptosis.
  • Understanding cytochrome c release is vital for deciphering disease mechanisms linked to apoptosis.
  • These methods will advance research into the regulation of MOMP and the development of therapeutic strategies.